Updated: 2025-08-20 02:14:25.749573
Description:
A flaw was found in the KVM's AMD code for supporting the Secure Encrypted Virtualization-Encrypted State (SEV-ES). A KVM guest using SEV-ES can trigger out-of-bounds reads and writes in the host kernel via a malicious VMGEXIT for a string I/O instruction (for example, outs or ins) using the exit reason SVM_EXIT_IOIO. This issue results in a crash of the entire system or a potential guest-to-host escape scenario.
| Links | NIST | CIRCL | RHEL | Ubuntu |
| Severity | Score | |
|---|---|---|
| CVSS Version 2.x | HIGH | 7.2 |
| CVSS Version 3.x | HIGH | 8.8 |
| OS name | Project name | Version | Score | Severity | Status | Errata | Last updated | Statement |
|---|---|---|---|---|---|---|---|---|
| AlmaLinux 9.2 ESU | kernel | 5.14.0 | 8.8 | HIGH | Already Fixed | 2024-07-01 10:16:45 | ||
| CentOS 6 ELS | kernel | 2.6.32 | 8.8 | HIGH | Not Vulnerable | 2022-03-30 15:43:18 | ||
| CentOS 7 ELS | kernel | 3.10.0 | 8.8 | HIGH | Not Vulnerable | 2024-07-01 10:09:56 | ||
| CentOS 8.4 ELS | kernel | 4.18.0 | 8.8 | HIGH | Not Vulnerable | 2024-07-01 10:35:15 | ||
| CentOS 8.5 ELS | kernel | 4.18.0 | 8.8 | HIGH | Released | CLSA-2023:1690294029 | 2023-07-25 11:16:01 | |
| CentOS Stream 8 ELS | kernel | 4.18.0 | 8.8 | HIGH | Already Fixed | 2024-06-09 11:20:37 | ||
| CloudLinux 6 ELS | kernel | 2.6.32 | 8.8 | HIGH | Not Vulnerable | 2022-03-30 15:43:18 | ||
| CloudLinux 7 ELS | kernel | 3.10.0 | 8.8 | HIGH | Ignored | 2025-01-10 22:43:42 | CL7 support is limited | |
| Oracle Linux 6 ELS | kernel | 2.6.32 | 8.8 | HIGH | Not Vulnerable | 2022-03-30 15:43:18 | ||
| Ubuntu 16.04 ELS | linux-hwe | 4.15.0 | 8.8 | HIGH | Not Vulnerable | 2022-10-04 14:02:36 |